Explain how electrical energy can be transformed into heat, light, and sound energy, as well as the energy of motion (give examples)

Power lines are everywhere. They carry electricity from power stations to our homes. Electrical energy comes from the movement of charged particles, such as electrons. This kind of energy is also referred to as electricity.

Electrical energy is very important because machines can change electricity into many other forms of energy. We use electrical energy to light and heat our homes, run our dishwashers and washing machines, cook our food, play our music, and more. Electrical energy can be converted into heat, light, sound, or mechanical energy. Electricity travels through conducting materials, such as wires and changes the electrical energy into other kinds of energy. For example:

· light energy when electrical energy causes the metal wire in a lightbulb to glow

· sound energy when electrical energy causes speakers in a radio to vibrate

sound

The part of the speaker that converts electrical into mechanical energy is frequently called the motor, or voice coil. The motor vibrates a diaphragm that in turn vibrates the air in immediate contact with it, producing a sound wave corresponding to the pattern of the original speech or music signal.

heat

A toaster draws electric current (electrical energy) from a wall outlet and converts these moving electric charges into heat (thermal energy) in the filaments that turn red hot to cook your toast. ... As electricity runs through the filaments in a space heater, the electrical energy is converted into heat (thermal energy).

light

Electrical energy conversion to light and heat. ... In the case of an electric bulb, the electrical energy is converted to light and heat. The amount of electrical energy put into a bulb = the amount of light energy (desirable form) plus the heat energy that comes out of the bulb (undesirable form).

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